Openreach ONT, Developer'S Manual

Page: 3 / 52

3
Internal equipment
1
The ONT is the Openreach demarcation point.
It replaces the traditional copper master socket.
The Openreach ONT sits in an enclosure along with
the Battery Backup Unit (BBU) and associated wiring,
keeping everything neat and tidy. The enclosure is
designed for simple wall mounting with just 2 screws.
• Optical port connects to the external
Customer Splice Point.
• Ethernet port connects to the
communications provider's (CP) router.
• Telephony port connects to voice network.
Openreach Optical Network
Termination (ONT) and enclosure
254mm
215mm
Battery Backup Unit (BBU)
The BBU sits in the enclosure along with the ONT. It supports
voice calls for approximately an hour should there be any
interruption to the mains power supply.
A red warning light will flash when a replacement battery is
required. Openreach warranties the battery for 90 days, where
it then becomes the responsibility of the home owner.
How to build a fibre network - version 7.1